Find the Reference Angle 15

Problem

15

Solution

1. Identify the quadrant in which the given angle θ=15 lies.

2. Determine that since 0<15<90 the angle is in the first quadrant.

3. Apply the rule for reference angles θ′ in the first quadrant, which states that θ′=θ

4. Calculate the reference angle by setting θ′=15

Final Answer

θ′=15

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